Dredging-machine



(No Model.)

L. W. BATES.

DREDGING. MACHINE No. 527,762. Patented'Oct. 23, 189.4.

I dZZwweyA g NITED STATES PATENT OFF CE.

LINDON W. BATES, OF CHICAGO, ILLINOIS.

DREDGlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 527,162, dated October 23, 1894. Application filed September 4, 1894- Serial No. 522,014. (No model.)

T at whom it may concern.-

Be it known that I, LINDON W. BATES,a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Im provements in Dredging-Machines, of which the following is a specification.

My invention relates to dredging machines and hasreference more particularly to that class of machines in which the material is elevated through a pivoted suction-pipe, carried by the dredge boat or by a ponton in advance of the boat; the ponton or the boat being provided with a well-way in which the suction-pipe rises and falls as required. The suction-pipe is provided with a rotary cutter, but when cutting or working in hard soil, the

cutter, meeting with resistance, tends to throw the suction-pipe laterally against the side walls of the well-way, thus causing undue vibration, wear, and, sometimes, injury to the suction-pipe or its ladder. To overcome these objections is the object of the present invention. This is accomplished by the construction shown in the drawings, in which- Figure l-is a longitudinal sectional view of so much of a dredging machine as is necessary to illustrate the present invention; Fig. 2, a plan View; Fig. 3, a transverse sectional view through the suction-pipe; and Fig. 4, a perspective view of certain details.

In the figures A indicates the dredge-boat B, the ponton; O the pivoted suction pipe, and D the ladder, all of which may be of most any desired construction.

The ponton is provided with the usual well-Way andon the side walls of the latter are arranged the tracks or plates a which will advisably be curved on the arc of a circle concentric with the pivot of the suction pipe:

' the lower ends of the tracks diverging as shown in Fig. 3 so that-in case the suction pipe should pass off the tracks or plates, its re-entrance therebetween will be facilitated.

Mounted upon the side timbers of the ladder are brackets b, in which are journaled wheels or rollers c which latter, as shown, bear upon the tracks or plates at 00 carried by the tracks or plates a, the beveled or inclined,

ends of the ladder facilitate the re-entrance of the suction-pipe.

What I claim is- 1. In combination with a dredge boat and its pivoted ladder and suction-pipe; a ponton provided with a well-way; the tracks or plates a on the side walls of the ponton; and brackets carried by the ladder and provided with rollers to run upon the tracks.

2. In combination with a dredge boat, lad-' der, suction-pipe, and ponton; the tracks or plates-a. carried by the ponton and diverg ing at their lower ends; and the brackets and rollers carried by the ladder.

3. lncombination with a boat (or ponton) provided with a well-way; the tracks on the side walls of "the well-way; and pivoted suction pipe and ladder; and rollers carried by the ladder to engage the tracks. I

In Witness whereof I hereunto set my hand in the presence of two witnesses.

LINDON W. BATES.

Witnesses:

WM. W. BATES, J. H. GLENDENING. 

